Kagome surface states and weak electronic correlation in vanadium-kagome metals

被引：6

作者：

Ding, Jianyang ^{[1
,2
]}

Zhao, Ningning ^{[3
]}

Tao, Zicheng ^{[4
]}

Huang, Zhe ^{[1
,4
]}

Jiang, Zhicheng ^{[1
,2
]}

Yang, Yichen ^{[1
,2
]}

Cho, Soohyun ^{[1
]}

Liu, Zhengtai ^{[1
,2
]}

Liu, Jishan ^{[1
,2
]}

Guo, Yanfeng ^{[4
]}

Liu, Kai ^{[3
]}

Liu, Zhonghao ^{[1
,2
]}

Shen, Dawei ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Natl Key Lab Mat Integrated Circuits, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Renmin Univ China, Dept Phys, Beijing Key Lab Optoelect Funct Mat & Micronano De, Beijing 100872, Peoples R China

[4] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2023年 / 35卷 / 40期

基金：

北京市自然科学基金; 上海市自然科学基金; 中国国家自然科学基金;

关键词：

kagome surface state; electronic structure; RV6Sn6; ARPES; first-principles calculations; FERMIONS;

D O I：

10.1088/1361-648X/ace2a2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

RV6Sn6 (R = Y and lanthanides) with two-dimensional vanadium-kagome surface states is an ideal platform to investigate kagome physics and manipulate the kagome features to realize novel phenomena. Utilizing the micron-scale spatially resolved angle-resolved photoemission spectroscopy and first-principles calculations, we report a systematical study of the electronic structures of RV6Sn6 (R = Gd, Tb, and Lu) on the two cleaved surfaces, i.e. the V-and RSn1-terminated (001) surfaces. The calculated bands without any renormalization match well with the main ARPES dispersive features, indicating the weak electronic correlation in this system. We observe W'-like kagome surface states around the Brillouin zone corners showing R-element-dependent intensities, which is probably due to various coupling strengths between V and RSn1 layers. Our finding suggests an avenue for tuning electronic states by interlayer coupling based on two-dimensional kagome lattices.

引用

页数：7

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